Parameter | Category | Total population (N = 440) | Group 1 (GA 38 weeks, N = 318) | Group 2 (GA 39 weeks, N = 122) | p-value | |||
Freq. | % | Freq. | % | Freq. | % | |||
Age | Mean, SD | 32.90 | 4.81 | 32.91 | 5.01 | 32.89 | 4.27 | 0.976t |
Parity | 2 | 209 | 47.5 | 138 | 43.4 | 71 | 58.2 | 0.016* |
3 | 167 | 38.0 | 128 | 40.3 | 39 | 32.0 | ||
4+ | 64 | 14.5 | 52 | 16.4 | 12 | 9.8 | ||
Previous term labor | Median, P95 | 2 | 6 | 3 | 7 | 2 | 6 | 0.014*M |
Previous term labor (categorical) | 0 - 1 | 19 | 4.3 | 12 | 3.8 | 7 | 5.7 | 0.054 |
2 | 204 | 46.4 | 138 | 43.4 | 66 | 54.1 | ||
>2 | 217 | 49.3 | 168 | 52.8 | 49 | 40.2 | ||
Previous preterm labor | None | 402 | 91.4 | 289 | 90.9 | 113 | 92.6 | 0.560 |
1 or 2 | 38 | 8.6 | 29 | 9.1 | 9 | 7.4 | ||
SVD | None | 321 | 73.0 | 224 | 70.4 | 97 | 79.5 | 0.062 |
1 | 54 | 12.3 | 46 | 14.5 | 8 | 6.6 | ||
2+ | 65 | 14.8 | 48 | 15.1 | 17 | 13.9 | ||
No. of c/s | 2 | 279 | 63.4 | 187 | 58.8 | 92 | 75.4 | 0.003* |
3 | 127 | 28.9 | 101 | 31.8 | 26 | 21.3 | ||
4+ | 34 | 7.7 | 30 | 9.4 | 4 | 3.3 | ||
Time interval from last c/s | Mean, SD | 3.66 | 1.91 | 3.61 | 1.85 | 3.79 | 2.05 | 0.386t (0.438M) |
Time interval from last c/s (categorical) | <2 years | 50 | 11.4 | 36 | 11.3 | 14 | 11.5 | 0.964 |
2+ years | 390 | 88.6 | 282 | 88.7 | 108 | 88.5 | ||
Gestational diabetes | No | 336 | 76.4 | 245 | 77.0 | 91 | 74.6 | 0.588 |
Yes | 104 | 23.6 | 73 | 23.0 | 31 | 25.4 | ||
Smoking status | Smoker | 9 | 2.0 | 7 | 2.2 | 2 | 1.6 | 1.000F |
Non-smoker | 431 | 98.0 | 311 | 97.8 | 120 | 98.4 | ||
Job status | Employed | 86 | 19.5 | 68 | 21.4 | 18 | 14.8 | 0.116 |
Unemployed | 354 | 80.5 | 250 | 78.6 | 104 | 85.2 | ||
BMI (kg/m2) | Mean, SD (range = 18.50, 52.00) | 32.92 | 5.99 | 33.30 | 6.22 | 31.93 | 5.25 | 0.032*t |